Isobutyric acid

Structural formula
General
Surname	Isobutyric acid
other names	2-methylpropanoic acid ( IUPAC ); Isobutyric acid; Isobutanoic acid; ISOBUTYRIC ACID ( INCI ) ;
Molecular formula	C 4 H 8 O 2
Brief description	colorless liquid with a characteristic odor
External identifiers / databases
EC number	201-195-7
ECHA InfoCard	100.001.087
PubChem	6590
ChemSpider	6341
DrugBank	DB02531
Wikidata	Q415062
properties
Molar mass	88.11 g · mol -1
Physical state	liquid
density	0.95 g cm −3 (20 ° C)
Melting point	−46 ° C
boiling point	155 ° C
Vapor pressure	1.81 h Pa (20 ° C)
pK s value	4.86 (25 ° C)
solubility	moderate in water (210 g l −1 at 20 ° C)
Refractive index	1.3920 (20 ° C)
safety instructions
H and P phrases	H: 226-302-311-314
	P: 280-301 + 330 + 331-303 + 361 + 353-304 + 340-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Isobutyric acid is a chemical compound used as an additive in the cosmetics and food industries and as an intermediate in general in the chemical industry. It is an isomer of butyric acid .

Extraction and presentation

Isobutyric acid can be produced, among other things, by the oxidation of isobutyraldehyde .

use

Isobutyric acid is found as an additive in cosmetics. It is suitable as a polar solvent for various chemical reactions. The salts of isobutyric acid are used in textile auxiliaries, tanning agents, stabilizers and preservatives. Isobutyric acid can be used as an intermediate in the manufacture of herbicides as well as paint and plastic raw materials. The esters of isobutyric acid with monofunctional alcohols are used as fragrances and flavorings (e.g. some of the compounds have a pineapple-like odor).

safety instructions

Vapors cause irritation of the eyes, the respiratory tract, the lungs and the skin, narcotic effects through high concentrations. Contact with the liquid is severely irritating to the eyes and skin.

Web links

Commons : Isobutyric acid - Collection of pictures, videos and audio files

Isobutyric acid data sheet from Celanese Chemicals Europe GmbH (PDF file; 77 kB)

Individual evidence

↑ Entry on ISOBUTYRIC ACID in the CosIng database of the EU Commission, accessed on August 10, 2020.
↑ Entry on isobutyric acid. In: Römpp Online . Georg Thieme Verlag, accessed on May 30, 2016.
↑ ^a ^b ^c ^d ^e ^f ^g Entry on isobutyric acid in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
↑ ^a ^b CRC Handbook of Tables for Organic Compound Identification , Third Edition, 1984, ISBN 0-8493-0303-6 .
↑ Entry on isobutyric acid in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

[CosIng-1] Entry on ISOBUTYRIC ACID in the CosIng database of the EU Commission, accessed on August 10, 2020.

[2] Entry on isobutyric acid. In: Römpp Online . Georg Thieme Verlag, accessed on May 30, 2016.

[GESTIS-3] ↑ ^a ^b ^c ^d ^e ^f ^g Entry on isobutyric acid in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .

[CRC_2-4] CRC Handbook of Tables for Organic Compound Identification , Third Edition, 1984, ISBN 0-8493-0303-6 .

[CLP_100.001.087-5] Entry on isobutyric acid in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .